The change in entrophy of 2 moles of ideal gas upon isothermal expansion at `243.6 K` from 20 liter until the pressure becomes 1 atm, is :

Question

The change in entrophy of 2 moles of ideal gas upon isothermal expansion at `243.6 K` from 20 liter until the pressure becomes 1 atm, is :

The change in entrophy of 2 moles of ideal gas upon isothermal expansion at `243.6 K` from 20 liter until
the pressure becomes 1 atm, is :
A. 1.385 cal/K
B. `-1.2 cal//K`
C. `-30 J//mol.K`
D. None of these

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - C
`DeltaS= nRT In (V_(2))/(V_(1))`
`V_(2) = 40`
`V_(1) = 20`
`DeltaS = 2 xx 2 In 2`
` = 4 In 2 = 2.77 cal`

4 views Answered 2023-02-05 15:29